happen. >> reporter: they point to evergreen oil in newark. the company recycles used motor oil, and government records show it has a history of polluting, oil spill, explosions, major fire, including this one in 2011. we found hundreds of complaints stretching back to 1987. residents reporting difficulty breathing and nausea. >> sinuses would burn. and it just -- you just didn't feel like you could work outside. >> they have denied it, denied it, denied it. i do not think they're being regulated very well at all. >> reporter: evergreen has been cited by multiple local agencies from everything from leaked fumes to high levels of arsenic in waste water. source says the dtse could revoke evergreen's permits, but instead gave it a series of small fines. the dtse says its oversight is limited, which have the ability to look at both air and water, and we're not doing a good enough job. and we're trying to pawn off our responsibility. >> reporter: in 2000, whenever green was accused of illegally burning pcbs, a chemical linked to cancer, the company settled with the dtsc for $825,000.